1222011001 has 4 divisors (see below), whose sum is σ = 1222252672. Its totient is φ = 1221769332.

The previous prime is 1222010989. The next prime is 1222011013. The reversal of 1222011001 is 1001102221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1222010989) and next prime (1222011013).

It is a cyclic number.

It is not a de Polignac number, because 1222011001 - 2⁵ = 1222010969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222011031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113085 + ... + 123418.

It is an arithmetic number, because the mean of its divisors is an integer number (305563168).

Almost surely, 2^1222011001 is an apocalyptic number.

It is an amenable number.

1222011001 is a deficient number, since it is larger than the sum of its proper divisors (241671).

1222011001 is an equidigital number, since it uses as much as digits as its factorization.

1222011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241670.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1222011001 is about 34957.2739354773. The cubic root of 1222011001 is about 1069.1165156029.

Adding to 1222011001 its reverse (1001102221), we get a palindrome (2223113222).

The spelling of 1222011001 in words is "one billion, two hundred twenty-two million, eleven thousand, one".